#### Explanation:

3% of $300$ is:
$300 \cdot \frac{3}{100} = 9$

So you will get every quarter +309$ This means you get $4 \cdot 309 = 1236$annualy. After 3 years you get: 1236*3=3708$

So in the end you have:
3708+300=4008\$